| Summary: | 碩士 === 淡江大學 === 資訊工程學系 === 89 === Distance Learning/Virtual University system is one of the most important application of multimedia communication. In a distance learning environment, video clips (pre-recorded) can be integrated with slide presentations. It is very important to synchronize video with slide changes. Otherwise, the slide presentation will be senseless. We have developed a tool, which allows the coursed designer or the instructor to record synchronized lecture-on-demand presentations. While the presenter is using a digital video camera to record his presentation, the use of PowerPoint slides can be recorded. The integration relies on the Advanced Streaming Format (ASF) solution provided by Microsoft. While saved as an ASF file, the lecture-on-demand record can be broadcasted to students. Figure 6 illustrates such a system. The system can let users to select video and audio configuration to meet different devices and network infrastructures available to the user. From the perspective of students, we also provide some tools. One of the successful examples is the electronic notebook tool shown in figure 7, which allows students to cut and paste Web objects, including test paragraphs and pictures, to be saved as HTML files. The system is integrated with the annotation tool, as well as some video and audio communication tools. It is the hope that, the system can provide a computer supported collaborative environment for students to discuss homework, and to write a team report. The electronic notebook is also integrated with the personal mobile agent. We believe that, the integrated environment will be very easy for students to use, as well as for the instructors to supervise the whole distance learning process.
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